Beatles fans have been given the opportunity of a lifetime to own a rare piece of rock 'n' roll history - the band's original recording contract signed by all four members.The Fab Four became a global phenomenon when they emerged on the scene in the 1960s, going down in history as one of the most commercially successful groups ever. And now the Brian Epstein contract that landed John Lennon, Sir Paul MCCartney, George Harrison and Ringo Starr their big break has been put up as the grand prize in a new competition by The Imagine Corporation. All devotees have to do is guess the value of the treasured document, which is insured for $1.25 million (£500,000). Ted Owen, Business Development Director of The Imagine Corporation, says, "During my 30 years of experience in the memorabilia business, there has been nothing more exciting than this opportunity to reward a lucky fan with popular music's ultimate prize, something that Beatles fans around the world could only dream of! I am delighted that we will be able to change one person's life with the winning of the contract in our inaugural competition."